Safety device.



G. W. 'BURRIS. SAFETY-DEVICE.

APPLICATION rum) ma. 10. 1909.

Patented Deer 21, 1909.

2 SHEETS-SHEET 1.

I a a a e w I G. W. BURRIS.

SAFETY DEVICE.

AYPLIOAI'ION mum MAR. 10. 1909.

Patented Dec. 21, 1909.

2 SHEETS-SHEET 2.

3141:011 l o a wam WWW

A NT @FFlQFL.

CHARLES W. BURRIS, OF BLACK DIAMOND, WASHINGTON.

SAFETY DEVICE.

Specification of Letters latent.

Patented Dec. 21, 1909.

Application filed March 10, 1909. Serial No. 482,556.

To all ilk/tom it may concern:

lie it known that 1, CHARLES VJ. BURRIS, a. citizen of the United States, residing at Black Diamond, in the county of King and State of lVashington, have invented certain new and useful Improvements in Safety De vices; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in safety devices, and particularly to safety devices for cars, conveyers, elevators, and the like, which will automatically be moved for stopping the car or other device when the same is moved in a reverse direction from its ordinary and correct direction of movement.

The object in view is the provision of means operable by the movement of the car to which the same is secured that will engage the rail with a gripping action for preventing any considerable movement of the car.

A further object of the invention is the provision of a car and gripping member ar ranged to grip the rail upon which the car is mounted, and means for connecting the gripping member with the wheels of a car when the car is moved backward, whereby the gripping member grips the rail and positively locks the car against movement.

A still further object of the invention is the arrangement of rail clamping members mounted upon a car having connected therewith rotating threaded shafts for causing said clamping members to engage the rails when rotated in one direction, and means connecting said shafts with the wheels of the car when power is removed from the draw bar of the car, whereby any reverse movement of the car will actuate said shaft for causing said clamps to engage the rails upon which the car is mounted.

Vith these and other objects in view the invention comprises certain novel constructions, combinations and arrangement of parts as will be hereinafter more fully de scribed and claimed.

In the accompanying drawings: Figure 1 is a top plan view of a car with the body removed. Fig. 2 is a side elevation of the structure shown in Fig. 1. Fig. 3 is an enlarged detail fragmentary edge view of the rail clamp. Fig. 4 is a front view of the rail 1 flange 19.

clamp shown in Fig. 3. Fig. 5 is a rear view of the clamp shown in Fig. 3. Fig. 6 is a detail sectional view through one of the gears and supporting bearings embodying certain features of the invention. Fig. 7 is a section through Fig. (3 approximately on line 7 7.

Referring to the drawing by numerals, 1 indicates supporting rails, 2 the rear wheels of a car to which are secured an axle 3, and t indicates the front wheels connected by an axle 5, the axles 3 and 5 supporting the car body not shown.

ltigidly secured to axle 3 is a gear wheel 6 arranged to mesh with a gear wheel 7 from which power is transmitted through various mechanism hereinafter fully described to a pair of clamping members 8 and 9, and 10 and 11. These clamping members are arranged to clamp the rails 1 upon which the wheels 2 and 4 are located so as to prevent movement of the same in one direction.

Gear wheel or pinion 7 is rigidly secured to the draw bar 12, and is preferably made one half the size of gear wheel 6. Rigidly secured to draw bar 12 is another gear 13 that is arranged to connect or transmit power to pinions 14; and 15. If desired draw bar 12 could be provided with a swivel intermediate its length for permitting gear 13 and pinion 7 to revolve without revolving eyelet 16, though ordinarily such structure is not necessary. Pinion 1 1 meshing with gear 13 is mounted in a bearing member 17 more clearly shown in Fig. (3. The gear let is formed with a smooth bore through which a threaded shaft 18 is designed to pass, and is also formed with a flange 19 for engaging a groove in bearing member 17, bearing member 17 being made in parts so as to permit the assembling of the same over The bearing member 17 is also provided with threads 20 for engaging the threads 21 of shaft 18, whereby said shaft is moved longitudinally whenever the same is rotated.

In order to convey power from gear 13 to shaft 18 pinion 14s is provided with a key 22 which is rigidly secured thereto and arranged to be loosely mounted in a key-way 23 formed in shaft 18. By this structure whenever pinion 14: rotates key 22 will rotate shaft 18, and as shaft 18 is rotated the same moves longitudinally. Shaft 18 is supported near its outer end by a bearing kind, and is 1G dii'ecticon as pitch thereof. 18 has rigidly semrs 26 and 27 and n 28 positioned be the some having llPlbGl'S 29. The lield n 30, ii-1011 by sult-nb n.181l)Y When ver Shaft 18 udimliv 1 1 2 direction toit! ember 8 will be 'n oping n einbe d l with on opening so? a tree )ivotalino'veruetion and and 9 may also ene is providet 1 which shaft 18 t 82, the pitch twice that of so as to accommonanner as shaft 18 toward the center 32 and 1'. il 1, and l he pitch riopi'ig -neinber l Wil 3211118 rate of speed as will be moved inward so 1 st the some time.

pivotslly secured to 1. members 8 and 9 at o fol-n1 a fulcrum for 1 r s rm. ((1161 211 L :5

1d power Wil and 9 1, Whereseine being side of the power is as power Wi l be pulled notion of spring 3 ear 6. is soon as pinion T and gear been hsengugeo and spi ng 3 (oin- 1e car were going up incline. the

mid naturally stop and tnen start to go down the incline. diste y after tie power has been from the car n1 venient oi the car tones the ions noving pert-s 'e es heretotoi-e set toi'th for cansn'ieinbers 8 and 9 and 10 and 11 ip the rails 1. By this construeobserve that the gripping s before the car has -1ed any E1Sl l1ill3i6 in mention, and ee 1 ally lock the car against .1 All that is necessary n grinning members 8 and 9 and 10 nll forward the oz 1' a short dissng drew bar 12. This Will {S 18 end 18 and associated the opposite direction for opening up the gripping members. The power then may be epplied to draw: bar 12 and the our red It" mo in place to place in the usual Way. its long as power is applied to draw bur 12 13 and pinion are 0st of mesh. it 1 sired springs cape.

nnd may surround shafts 18 and 18 so remove gripping 1 en'ibers 8 and 9 and 11 from en agement With the rails power is applied to draw bar 12 so as o necessitate a forward movement of in use the safety ttaelnnent embodying th invention, is adopted to be used part1"- sriy with nnne cars, and in order that the in members 8 and and 10 und 11 down near the rails and liable to with various nmtter flamed eck, means are provid d for northe gripping in -bers above ihese means are an ipted to le ed for lowe ing the gripping members upon power being disconnected 111 ch. her 12 so that upon shy reorwsrd movement or the car the grippinr members will engage the rails. These mean? shown more pnrtieul ll in Figs. 1 2111i, 2 in which is a. bar pivotelly mounted 2t to gripping 11'i111l)61 9. Bar 35 is also t 3? to a reciproeting bnr which in turi moves oetween guides and Guides 39 1nd 10 are si. )orted on any desirel nisnner. T I i is rigidly secured to a c turn is rigidly secured o nran' bar 124. this niechani in W ienever power is to draw bar 12 not only will geur 13 and pinion 7 be disengaged but cross bur 1-1 will applied be moved toward the front of the car, and bar 38 at each side of the car will be moved longitudinally and exert a pulling action upon bar or link 35. This will pull the upper end of all of the gripping members for ward, and as the same are pivotally mounted upon shaft 18 and 18 the lower end of the same will be moved upwardly and rearwardly. In order to limit the forward movement of the lower end of the gripping members, and also to guide the same in their movement, bars or links 42 are pivotally secared to gripping members 9 and 10 and pass upward through guides 43 and 44: which also act as stops. The bar or link 42 is 1 formed with a head 45 which engages bar or link ts for limiting the downward movement of the gripping members. The guides 5L3 and 44 are secured to the car in any desired or preferred manner. By this construetion and arrangement it will be observed that whenever power is applied to draw bar 12 the gripping members will have their ends swung upwardly and rearwardly, and also the mechanism for operating the same will be thrown out of gear. Immediately upon power being disconnected from draw bar 12 the mechanism for operating the gripping members will be thrown into mesh and also the lower end of the gripping members will be thrown downwardly and forwardly ready for engaging the rails upon a rearward movement of the car.

The mechanism embodying the invention is preferably used upon any car or conveyer running on tracks, and is adapted to be used particularly on cars operating on inclined runways or tracks so that in case any of the cars should break away from their pulling or motive power the same would be quickly and automatically stopped by the gripping members engaging the rails.

In the drawings is shown one embodiment of the invention as applied to a car, and the various threads set forth therein are shown as left-hand threads, but it will be of course evident that the threads may be changed to right-hand threads upon readjustment of the gears, or rearrangement of the same.

()ther slight changes and adaptations may be made as will be evident within the spirit of the invention.

hat I claim is:

1. In a safety appliance, a pair of gripping members,'means for normally holding the. same out of operation. and a revolving and reciprocating shaft for throwing the same into operation.

In a safety appliance for cars, a gripping member for engaging the 'ail upon I which the car is mounted, revolving and reciprocating means for causing the gripping members to engage said rail, and means for a l l l l 1 l l normally holding said first mentioned means out of operation.

3. In a safety appliance for cars, a clamping member formed of a plurality of parts for gripping the rail upon which the car is mounted, a reciprocating shaft acting upon same to grip said rail, and means connecting said shaft with the wheels of the car, whereby upon the rearward movement thereof said clamping member will be operated for engaging said rail.

l. In a safety appliance for cars, a pair of gripping members, a shaft connected to said gripping members for operating the same, a draw bar, means mounted on the draw bar and connected with said shafts for rotating the same when the d 'aw bar has been disconnected from its motive power, and means for connecting said draw bar with the wheels of the car for rotating the draw bar when the motive power has been removed from the draw bar, whereby power is transmitted from the wheels of the car to said shafts for operating said gripping members.

5. In a safety appliance for cars, gripping members for engaging the rails upon which the ear is mounted, means for connecting the gripping members with some of the wheels of the car, said means being designed to so connect the gripping members and the wheels of the car as to cause the gripping members to clamp said rails upon the rearward movement of said car, and means for moving the gripping members above said rails when the car is moved forward.

6. In a safety appliance for cars, a gripping member on each side of said car for gripping the rails upon which the car is 10- eated, a revolving and reciprocating shaft connected to each of said gripping members for operating the same, a reciprocating draw bar, means for connecting said shafts and said draw bar when the draw bar has been disconnected from its motive power, and means for connecting the draw bar with some of the wheels of the car, whereby the same is rotated when the draw bar is connected with said shafts, whereby power is conveyed from said wheels to said revolving and reciprocating shafts for operating said gripping members.

7. In a safety appliance for cars, a gripping member on each side of the car arranged to grip the rails upon which the car is located, means for connecting said gripping members and some of the wheels of said car for causing the gripping members to engage said rails when the car is moved rearwardly, and means connected with the 1 draw bar of the car for causing said gripping members to be swung above said rails when the car is being moved forwardly.

8. In a safety appliance for cars, a gripping member on each side of the car adapted said clamping member for causing the .ltlt) llO to grip the rails upon which the car is located, each of said gripping members comprising e pivotally mounted gripping jaw, a rotating and reciprocating shaft connected to the outer jaw of each of said ripping members, means for connecting tne inner jaw of each of said gripping members to said shafts for causing the inner grippin jaws to m-zwe outwardly upon the rotnti on of said shafts, means for rotating and moving longitudinally said shafts, whereby said outer and inner jaws are mo ed toward each other for gripping said rails, a reeiprocat- 1 ing draw bar, means for connecting sai l draw bar and said shafts for conveying rotary movement from said draw bar to said shafts for normally holding did last mentioned means in engagement, and means secured to said drew her for connecting the same with the wheels or" a car, whereby motion is conveyed upon movement of said car to said gripping members for causing the same to grip said mils said last mentioned means being connected with the wheels of the car when the reciprocating draw bar is connected with said shafts.

In testimony whereof I znlix my signature in presence of two witnesses.

CHARLES W. BURRE S.

Witnesses G. XVARD KEMP,

ALEXANDER HUToHINsoN. 

